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function f=nrtl(g)
syms r1 r2 r3 r4 a t12 t21 R g21 g12 x2 x4 s1 s2 x1 x3 T;
T=298.15;
x1=O.999889456;
x3=O.01617526;
x2=l-x1;
x4=l-x3;
a=O.20;
R=8.314;
t21=g(1)/(R*T);
t12=g(2)/(R*T);
g21=exp(-a*t21);
g12=exp(-a*t12);
r1=exp(x2^2*(t12*(g12/(x1+x2*g21))^2+t12*g12/(x2+x1*g12)^2));
r2=exp(x1^2*(t12*(g12/(x2+x1*g12))^2+t21*g21/(x1+x2*g21)^2));
r3=exp(x4^2*(t12*(g12/(x3+x4*g21))^2+t12*g12/(x4+x3*g12)^2));
r4=exp(x3^2*(t12*(g12/(x4+x3*g12))^2+t21*g21/(x3+x2*g21)^2));
s1=x1*r1-x3*r3;
s2=x2*r2-x4*r4;
f=s1^2+s2^2
s1
s2
r1
r2
r3
r4
[x,fval]=fiminsearch(x1,x2)


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littlepoint

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xiegangmai: ½ð±Ò+1, лл²ÎÓ룡 2013-04-07 23:18:21
¹ÂÖñÐÐÕß: ½ð±Ò+5, ¡ï¡ï¡ïºÜÓаïÖú 2013-04-15 12:36:21
ÕâÖÖÎÊÌâ×Ô¼ºÏÈÊÔ׎âһϣ¬¿´¿´»ù±¾Ô­Àí¡£ÕâÖÖÉÏÀ´¾ÍÇóÔ´´úÂëµÄ¸ã·¨²»Ò×ÓÚ×Ô¼ºµÄÌá¸ßÓ´¡£http://www.pudn.com/downloads62/sourcecode/math/detail213534.html
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3Â¥: Originally posted by littlepoint at 2013-04-07 15:27:05
ÕâÖÖÎÊÌâ×Ô¼ºÏÈÊÔ׎âһϣ¬¿´¿´»ù±¾Ô­Àí¡£ÕâÖÖÉÏÀ´¾ÍÇóÔ´´úÂëµÄ¸ã·¨²»Ò×ÓÚ×Ô¼ºµÄÌá¸ßÓ´¡£http://www.pudn.com/downloads62/sourcecode/math/detail213534.html

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